wp_show_heic_upload_error() │ WP 5.5.0

Callback to enable showing of the user error when uploading .heic images.

No Hooks.

Returns

Array[]. Modified settings for Plupload.js.

Usage

wp_show_heic_upload_error( $plupload_settings );
$plupload_settings(array[]) (required)
The settings for Plupload.js.

Changelog

Since 5.5.0 Introduced.
Since 6.7.0 The default behavior is to enable heic uploads as long as the server supports the format. The uploads are converted to JPEG's by default.

wp_show_heic_upload_error() code WP 6.9.1

wp-includes/media.php 
function wp_show_heic_upload_error( $plupload_settings ) {
	// Check if HEIC images can be edited.
	if ( ! wp_image_editor_supports( array( 'mime_type' => 'image/heic' ) ) ) {
		$plupload_init['heic_upload_error'] = true;
	}
	return $plupload_settings;
}